<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>06-css常用样式.html</title>
    <style type="text/css">
        div {
            color: blue;
            width: 800px;
            height: 800px;
            background-color: yellowgreen;
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        a {
            text-decoration: none;
        }

        table {
            border: 1px solid black; /*设置边框*/
            border-collapse: collapse; /*将边框合并*/
        }

        td, th {
            border: 1px solid black; /*设置边框*/
        }
        ul{
            list-style: none; /*去掉列表前的符号*/
        }
    </style>
</head>
<body>

<ul>
    <li>11111111111</li>
    <li>11111111111</li>
    <li>11111111111</li>
    <li>11111111111</li>
    <li>11111111111</li>
</ul>
<table>
    <tr>
        <td>1.1</td>
        <td>1.2</td>
    </tr>
</table>
<a href="http://www.baidu.com">百度</a>
<div>我是 div 标签</div>

</body>
</html>